Spin-coated organic blends of the five-ring PPV-type oligomer 2,5-di-n-octy
loxy-1,4-bis((4 ' ,4 " -bisstyryl)styrylbenzene) (Ooct-OPV5) and polystyren
e (PS) have been investigated in order to retrieve relevant parameters for
the simulation of Schottky diodes of the type ITO/Ooct-OPV5:PS (1:1)/Al. A
value of 0.53 eV for the Schottky-barrier formed at the Al/oligomer was det
ermined by temperature-dependent IV-measurements. From the CV-characteristi
cs of the same diode structures, an upper limit of 3.3 x 10(15) cm(-3) for
the (p-type) doping concentration could be obtained. Thin film transistors
have been fabricated to derive a value of 9 x 10(-5) cm(2)/V s for the mobi
lity of the holes in a Ooct-OPV5:PS layer. The experimentally-determined pa
rameters were used as input for numerical simulations. A good correspondenc
e was found between the simulated and the experimental dark IV-curves of th
e ITO/Ooct-OPV5:PS (1:1)/Al device structure. For the illuminated IV-curves
, a large difference between the experimental and simulated short-circuit p
hotocurrent was observed due to incomplete dissociation of excitons. (C) 20
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